Well, i'm not sure where to begin.
He was raised in a wealthy canterlot household, but opted out of the lifestyle in his older years. Wishing to "serve the country that once served him" to put it in his words. He has been in the guard for the past 5 years, excluding a small hiatus.
Since colthood he has been very versed in magic, managing to get enrolled in Celestias school for giftes unicorns. He has a strong sense of loyalty to Princess Celestia in particular.
Thats about what i can think off the top of my head at the moment.